QKB2LE-80 Miniature Residual Current Circuit Breaker

Scope of Application

The QKB2LE series Miniature Residual Current Circuit Breakers are suitable for AC 50Hz (60Hz) circuits with a rated voltage of 230V, a rated insulation voltage of 500V, and rated currents from 6A to 80A. They are designed to provide protection against electric shock and equipment earth leakage faults. They feature overload, short-circuit, and residual current (earth leakage) protection functions. Customized versions with overvoltage protection and the ability to enable/disable the earth leakage tripping function are also available. They can also be used for infrequent switching of circuits.

Technical Parameters

1. Rated Voltage: AC 230V
2. Rated Insulation Voltage (Ui): 500V
3. Rated Impulse Withstand Voltage (Uimp): 4000V
4. Rated Residual Operating Current (IΔn) (mA): 15, 30, 50, 100, 300
5. Rated Residual Non-Operating Current (IΔno) (mA): 0.5 IΔn
6. Ultimate Short-Circuit Breaking Capacity (Icn) (A): 6000, 10000
7. Service Short-Circuit Breaking Capacity (Ics) (A): 6000, 7500
8. Type of Residual Current Operation: Type A; Type AC
9. Rated Residual Making and Breaking Capacity (IΔm) (A): 2000
10. Rated Residual Current Tripping Time: See table.

Note: IΔt is the tripping time at the lower limit of the instantaneous operating current for types B, C, D.